According to TSA, the program allows passengers traveling on Alaska Airlines, American Airlines, Delta Air Lines, United Airlines and US Airways to participate in expedited screening. Advantages include being able to leave on shoes, light outerwear and belts, not having to remove laptops from their cases and leaving liquid or gel bags in carry-ons.

Eligible passengers include U.S. citizens who have opted-in through a participating airline and members of one of U.S. Customs and Border Protection's Trusted Traveler programs.

Pre-check should be available in Nashville and Memphis by April 1.

Because TSA will always incorporate random security measures, no one is guaranteed expedited screening.